Throws you often find useful in your wing chun

[Vajramusti]

I very much agree with this point but think that it can be a two way process; that is having experience elsewhere, whether in classic TCMA functions or otherwise, can sometimes help show the way to mastery of wing chun motions.

Joy, would you care to share your experience and give us an example of both a throw and a chi na movement that you can see in your forms in terms of practicing the motion?

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The forms are for mastering motions. Interaction with the opponent(s) shows you when to throw and when to chinna. Chinna is very very close quarters work.
In leg movements with a jong there is a leg sweep motion for instance. Biu jee form two handed motion witha leg sweep can result in a throw with experience and timing.
Of course there is much more.